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CoolPi-Armbian-Rockchip-RK3.../sound/soc/rockchip/rockchip_pdm_v2.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Rockchip PDM ALSA SoC Digital Audio Interface(DAI) driver
*
* Copyright (C) 2024 Rockchip Electronics Co., Ltd.
*/
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/rational.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include "rockchip_pdm_v2.h"
#include "rockchip_utils.h"
#define PDM_V2_DMA_BURST_SIZE (8) /* size * width: 8*4 = 32 bytes */
#define PDM_V2_PATH_MAX (4)
#define PDM_V2_DEFAULT_RATE (48000)
#define PDM_V2_START_DELAY_MS_DEFAULT (20)
#define PDM_V2_START_DELAY_MS_MIN (0)
#define PDM_V2_START_DELAY_MS_MAX (1000)
#define PDM_V2_REF_CLK_MAX 61440000
#define QUIRK_ALWAYS_ON BIT(0)
#define RK3506_PDM 0x2311
#define RK3576_PDM 0x2302
struct rk_pdm_v2_clkref {
unsigned int sr;
unsigned int clk;
unsigned int clk_out;
};
static const struct rk_pdm_v2_clkref clkref[] = {
{ 8000, 40960000, 2048000 },
{ 11025, 56448000, 2822400 },
{ 12000, 61440000, 3072000 },
{ 8000, 24000000, 2400000 },
{ 12000, 24000000, 2400000 },
};
static const struct pdm_of_quirks {
char *quirk;
int id;
} of_quirks[] = {
{
.quirk = "rockchip,always-on",
.id = QUIRK_ALWAYS_ON,
},
};
struct rk_pdm_v2_dev {
struct device *dev;
struct clk *clk;
struct clk *hclk;
struct clk *clk_out;
struct regmap *regmap;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct reset_control *reset;
struct pinctrl *pinctrl;
struct pinctrl_state *clk_state;
unsigned int start_delay_ms;
unsigned int clk_ref_frq;
unsigned int quirks;
unsigned int version;
};
static int get_pdm_v2_clkref(struct rk_pdm_v2_dev *pdm, unsigned int sr)
{
int i, clk_ref = 0;
if (!sr)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(clkref); i++) {
if (sr % clkref[i].sr)
continue;
if (clkref[i].clk_out % sr)
continue;
if (pdm->clk_ref_frq != 0) {
if (pdm->clk_ref_frq != clkref[i].clk)
continue;
}
clk_ref = 1;
break;
}
if (clk_ref)
return i;
else
return -EINVAL;
}
static inline struct rk_pdm_v2_dev *to_info(struct snd_soc_dai *dai)
{
return snd_soc_dai_get_drvdata(dai);
}
static void rockchip_pdm_v2_rxctrl(struct rk_pdm_v2_dev *pdm, int on)
{
if (on) {
regmap_update_bits(pdm->regmap, PDM_V2_SYSCONFIG,
PDM_V2_NUM_MSK,
PDM_V2_NUM_START);
} else {
regmap_update_bits(pdm->regmap, PDM_V2_FIFO_CTRL,
PDM_V2_DMA_RD_MSK, PDM_V2_DMA_RD_DIS);
regmap_update_bits(pdm->regmap, PDM_V2_SYSCONFIG,
PDM_V2_RX_MSK | PDM_V2_RX_CLR_MSK | PDM_V2_NUM_MSK,
PDM_V2_RX_STOP | PDM_V2_RX_CLR_WR | PDM_V2_NUM_STOP);
}
}
static int rockchip_pdm_v2_set_samplerate(struct rk_pdm_v2_dev *pdm, unsigned int samplerate)
{
unsigned int upsamplerate, mclk, ratio, scale = 0;
int index, ret = 0;
index = get_pdm_v2_clkref(pdm, samplerate);
if (index < 0)
return -EINVAL;
mclk = clkref[index].clk;
upsamplerate = clkref[index].clk_out;
ret = clk_set_rate(pdm->clk, mclk);
if (ret)
return ret;
/* Move the pdm clk source to cru */
ret = clk_set_rate(pdm->clk_out, upsamplerate);
if (ret)
return ret;
ratio = upsamplerate / samplerate / 2;
switch (ratio) {
case 8:
scale = 27;
break;
case 12:
scale = 33;
break;
case 16:
scale = 36;
break;
case 24:
scale = 42;
break;
case 25:
scale = 42;
break;
case 32:
scale = 45;
break;
case 48:
scale = 51;
break;
case 50:
scale = 51;
break;
case 64:
scale = 54;
break;
case 75:
scale = 57;
break;
case 96:
scale = 60;
break;
case 100:
scale = 60;
break;
case 125:
scale = 63;
break;
case 150:
scale = 66;
break;
default:
ret = -EINVAL;
break;
}
if (ret)
return ret;
dev_dbg(pdm->dev, "The upsamplerate is %d, ratio is %d, scale is %d\n",
upsamplerate, ratio, scale);
regmap_update_bits(pdm->regmap, PDM_V2_FILTER_CTRL,
PDM_V2_CIC_SCALE_MSK | PDM_V2_CIC_RATIO_MSK,
PDM_V2_CIC_SCALE(scale) | PDM_V2_CIC_RATIO(ratio));
return 0;
}
static int rockchip_pdm_v2_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct rk_pdm_v2_dev *pdm = to_info(dai);
unsigned int val = 0;
regmap_update_bits(pdm->regmap, PDM_V2_CTRL,
PDM_V2_SJM_SEL_MSK, PDM_V2_SJM_SEL_L);
if (pdm->version == RK3506_PDM) {
regmap_update_bits(pdm->regmap, PDM_V2_FILTER_CTRL,
PDM_V2_HPF_V2_R_MSK | PDM_V2_HPF_V2_L_MSK |
PDM_V2_HPF_V2_FREQ_MSK,
PDM_V2_HPF_V2_R_EN | PDM_V2_HPF_V2_L_EN |
PDM_V2_HPF_V2_FREQ_60);
} else if (pdm->version == RK3576_PDM) {
regmap_update_bits(pdm->regmap, PDM_V2_FILTER_CTRL,
PDM_V2_HPF_R_MSK | PDM_V2_HPF_L_MSK | PDM_V2_HPF_FREQ_MSK,
PDM_V2_HPF_R_EN | PDM_V2_HPF_L_EN | PDM_V2_HPF_FREQ_60);
}
rockchip_pdm_v2_set_samplerate(pdm, params_rate(params));
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
val |= PDM_V2_VDW(16);
break;
case SNDRV_PCM_FORMAT_S24_LE:
val |= PDM_V2_VDW(24);
break;
case SNDRV_PCM_FORMAT_S32_LE:
val |= PDM_V2_VDW(24);
break;
default:
return -EINVAL;
}
switch (params_channels(params)) {
case 8:
val |= PDM_V2_PATH3_EN;
fallthrough;
case 6:
val |= PDM_V2_PATH2_EN;
fallthrough;
case 4:
val |= PDM_V2_PATH1_EN;
fallthrough;
case 2:
val |= PDM_V2_PATH0_EN;
break;
default:
dev_err(pdm->dev, "invalid channel: %d\n",
params_channels(params));
return -EINVAL;
}
regmap_update_bits(pdm->regmap, PDM_V2_CTRL,
PDM_V2_PATH_MSK | PDM_V2_VDW_MSK,
val);
/* all channels share the single FIFO */
regmap_update_bits(pdm->regmap, PDM_V2_FIFO_CTRL, PDM_V2_RDL_MSK,
PDM_V2_DMA_RDL(8 * params_channels(params)));
return 0;
}
static int rockchip_pdm_v2_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct rk_pdm_v2_dev *pdm = to_info(cpu_dai);
unsigned int mask = 0, val = 0;
mask = PDM_V2_CKP_MSK;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
val = PDM_V2_CKP_NORMAL;
break;
case SND_SOC_DAIFMT_IB_NF:
val = PDM_V2_CKP_INVERTED;
break;
default:
return -EINVAL;
}
pm_runtime_get_sync(cpu_dai->dev);
regmap_update_bits(pdm->regmap, PDM_V2_CTRL, mask, val);
pm_runtime_put(cpu_dai->dev);
return 0;
}
static int rockchip_pdm_v2_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct rk_pdm_v2_dev *pdm = to_info(dai);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
rockchip_pdm_v2_rxctrl(pdm, 1);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
rockchip_pdm_v2_rxctrl(pdm, 0);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int rockchip_pdm_v2_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct rk_pdm_v2_dev *pdm = to_info(dai);
regmap_update_bits(pdm->regmap, PDM_V2_FIFO_CTRL,
PDM_V2_DMA_RD_MSK, PDM_V2_DMA_RD_EN);
regmap_update_bits(pdm->regmap, PDM_V2_SYSCONFIG,
PDM_V2_RX_MSK,
PDM_V2_RX_START);
usleep_range((pdm->start_delay_ms) * 1000, (pdm->start_delay_ms + 1) * 1000);
return 0;
}
static const struct snd_kcontrol_new rk3506_controls[];
static const struct snd_kcontrol_new rk3576_controls[];
static int rockchip_pdm_v2_dai_probe(struct snd_soc_dai *dai)
{
struct rk_pdm_v2_dev *pdm = to_info(dai);
dai->capture_dma_data = &pdm->capture_dma_data;
if (pdm->version == RK3506_PDM)
snd_soc_add_component_controls(dai->component, rk3506_controls, 1);
else if (pdm->version == RK3576_PDM)
snd_soc_add_component_controls(dai->component, rk3576_controls, 1);
return 0;
}
static const struct snd_soc_dai_ops rockchip_pdm_v2_dai_ops = {
.set_fmt = rockchip_pdm_v2_set_fmt,
.trigger = rockchip_pdm_v2_trigger,
.prepare = rockchip_pdm_v2_prepare,
.hw_params = rockchip_pdm_v2_hw_params,
};
#define ROCKCHIP_PDM_V2_RATES SNDRV_PCM_RATE_8000_192000
#define ROCKCHIP_PDM_V2_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_driver rockchip_pdm_v2_dai = {
.probe = rockchip_pdm_v2_dai_probe,
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 8,
.rates = ROCKCHIP_PDM_V2_RATES,
.formats = ROCKCHIP_PDM_V2_FORMATS,
},
.ops = &rockchip_pdm_v2_dai_ops,
.symmetric_rate = 1,
};
static int rockchip_pdm_v2_start_delay_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct rk_pdm_v2_dev *pdm = snd_soc_component_get_drvdata(component);
ucontrol->value.integer.value[0] = pdm->start_delay_ms;
return 0;
}
static int rockchip_pdm_v2_start_delay_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct rk_pdm_v2_dev *pdm = snd_soc_component_get_drvdata(component);
if ((ucontrol->value.integer.value[0] < PDM_V2_START_DELAY_MS_MIN) ||
(ucontrol->value.integer.value[0] > PDM_V2_START_DELAY_MS_MAX))
return -EINVAL;
pdm->start_delay_ms = ucontrol->value.integer.value[0];
return 1;
}
static int rockchip_pdm_v2_clk_ref_frq_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct rk_pdm_v2_dev *pdm = snd_soc_component_get_drvdata(component);
ucontrol->value.integer.value[0] = pdm->clk_ref_frq;
return 0;
}
static int rockchip_pdm_v2_clk_ref_frq_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct rk_pdm_v2_dev *pdm = snd_soc_component_get_drvdata(component);
pdm->clk_ref_frq = ucontrol->value.integer.value[0];
return 1;
}
static const char * const rpaths_text[] = {
"From SDI0", "From SDI1", "From SDI2", "From SDI3" };
static SOC_ENUM_SINGLE_DECL(rpath3_enum, PDM_V2_CTRL, 19, rpaths_text);
static SOC_ENUM_SINGLE_DECL(rpath2_enum, PDM_V2_CTRL, 17, rpaths_text);
static SOC_ENUM_SINGLE_DECL(rpath1_enum, PDM_V2_CTRL, 15, rpaths_text);
static SOC_ENUM_SINGLE_DECL(rpath0_enum, PDM_V2_CTRL, 13, rpaths_text);
static const char * const hpf_cutoff_text[] = {
"3.79Hz", "60Hz", "243Hz", "493Hz",
};
static const char * const hpf_v2_cutoff_text[] = {
"0.234Hz", "0.468Hz", "0.937Hz", "1.875Hz", "3.75Hz",
"7.5Hz", "15Hz", "30Hz", "60Hz", "122Hz", "251Hz",
"528Hz", "1183Hz", "3152Hz",
};
static SOC_ENUM_SINGLE_DECL(hpf_cutoff_enum, PDM_V2_FILTER_CTRL,
19, hpf_cutoff_text);
static SOC_ENUM_SINGLE_DECL(hpf_v2_cutoff_enum, PDM_V2_FILTER_CTRL,
21, hpf_v2_cutoff_text);
static const DECLARE_TLV_DB_SCALE(pdm_v2_digtal_gain_tlv, -6563, 75, 0);
static const struct snd_kcontrol_new rockchip_pdm_v2_controls[] = {
SOC_ENUM("Receive PATH3 Source Select", rpath3_enum),
SOC_ENUM("Receive PATH2 Source Select", rpath2_enum),
SOC_ENUM("Receive PATH1 Source Select", rpath1_enum),
SOC_ENUM("Receive PATH0 Source Select", rpath0_enum),
SOC_SINGLE_EXT("Start Delay Ms", 0, 0, PDM_V2_START_DELAY_MS_MAX, 0,
rockchip_pdm_v2_start_delay_get,
rockchip_pdm_v2_start_delay_put),
SOC_SINGLE_EXT("Reference Clock Frequency", 0, 0, PDM_V2_REF_CLK_MAX, 0,
rockchip_pdm_v2_clk_ref_frq_get,
rockchip_pdm_v2_clk_ref_frq_put),
};
static const struct snd_kcontrol_new rk3506_controls[] = {
SOC_SINGLE_RANGE_TLV("Gain Volume",
PDM_V2_GAIN_CTRL,
PDM_V2_GAIN_CTRL_SHIFT,
PDM_V2_GAIN_CTRL_MIN,
PDM_V2_GAIN_CTRL_MAX,
0, pdm_v2_digtal_gain_tlv),
SOC_ENUM("HPF Cutoff", hpf_v2_cutoff_enum),
SOC_SINGLE("HPFL Switch", PDM_V2_FILTER_CTRL, 20, 1, 0),
SOC_SINGLE("HPFR Switch", PDM_V2_FILTER_CTRL, 19, 1, 0),
};
static const struct snd_kcontrol_new rk3576_controls[] = {
SOC_SINGLE_RANGE_TLV("Gain Volume",
PDM_V2_FILTER_CTRL,
PDM_V2_GAIN_SHIFT,
PDM_V2_GAIN_MIN,
PDM_V2_GAIN_MAX,
0, pdm_v2_digtal_gain_tlv),
SOC_ENUM("HPF Cutoff", hpf_cutoff_enum),
SOC_SINGLE("HPFL Switch", PDM_V2_FILTER_CTRL, 22, 1, 0),
SOC_SINGLE("HPFR Switch", PDM_V2_FILTER_CTRL, 21, 1, 0),
};
static const struct snd_soc_component_driver rockchip_pdm_v2_component = {
.name = "rockchip-pdm-v2",
.controls = rockchip_pdm_v2_controls,
.num_controls = ARRAY_SIZE(rockchip_pdm_v2_controls),
.legacy_dai_naming = 1,
};
static int rockchip_pdm_v2_pinctrl_select_clk_state(struct device *dev)
{
struct rk_pdm_v2_dev *pdm = dev_get_drvdata(dev);
if (IS_ERR_OR_NULL(pdm->pinctrl) || !pdm->clk_state)
return 0;
/*
* A necessary delay to make sure the correct
* frac div has been applied when resume from
* power down.
*/
udelay(10);
/*
* Must disable the clk to avoid clk glitch
* when pinctrl switch from gpio to pdm clk.
*/
rockchip_utils_clk_gate_endisable(pdm->dev, pdm->clk_out, 0);
udelay(10);
pinctrl_select_state(pdm->pinctrl, pdm->clk_state);
udelay(10);
rockchip_utils_clk_gate_endisable(pdm->dev, pdm->clk_out, 1);
return 0;
}
static int rockchip_pdm_v2_runtime_suspend(struct device *dev)
{
struct rk_pdm_v2_dev *pdm = dev_get_drvdata(dev);
regcache_cache_only(pdm->regmap, true);
clk_disable_unprepare(pdm->clk);
clk_disable_unprepare(pdm->hclk);
clk_disable_unprepare(pdm->clk_out);
pinctrl_pm_select_idle_state(dev);
return 0;
}
static int rockchip_pdm_v2_runtime_resume(struct device *dev)
{
struct rk_pdm_v2_dev *pdm = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(pdm->clk_out);
if (ret)
goto err_clk_out;
ret = clk_prepare_enable(pdm->clk);
if (ret)
goto err_clk;
ret = clk_prepare_enable(pdm->hclk);
if (ret)
goto err_hclk;
regcache_cache_only(pdm->regmap, false);
regcache_mark_dirty(pdm->regmap);
ret = regcache_sync(pdm->regmap);
if (ret)
goto err_regmap;
rockchip_pdm_v2_rxctrl(pdm, 0);
rockchip_pdm_v2_pinctrl_select_clk_state(dev);
return 0;
err_regmap:
clk_disable_unprepare(pdm->hclk);
err_hclk:
clk_disable_unprepare(pdm->clk);
err_clk:
clk_disable_unprepare(pdm->clk_out);
err_clk_out:
return ret;
}
static bool rockchip_pdm_v2_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_V2_SYSCONFIG:
case PDM_V2_CTRL:
case PDM_V2_FILTER_CTRL:
case PDM_V2_FIFO_CTRL:
case PDM_V2_RXFIFO_DATA:
case PDM_V2_DATA_VALID:
case PDM_V2_GAIN_CTRL:
return true;
default:
return false;
}
}
static bool rockchip_pdm_v2_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_V2_SYSCONFIG:
case PDM_V2_CTRL:
case PDM_V2_FILTER_CTRL:
case PDM_V2_FIFO_CTRL:
case PDM_V2_DATA_VALID:
case PDM_V2_RXFIFO_DATA:
case PDM_V2_VERSION:
case PDM_V2_GAIN_CTRL:
return true;
default:
return false;
}
}
static bool rockchip_pdm_v2_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_V2_FIFO_CTRL:
case PDM_V2_RXFIFO_DATA:
case PDM_V2_VERSION:
return true;
default:
return false;
}
}
static bool rockchip_pdm_v2_precious_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_V2_RXFIFO_DATA:
return true;
default:
return false;
}
}
static const struct reg_default rockchip_pdm_v2_reg_defaults[] = {
{ PDM_V2_SYSCONFIG, 0x00000002 },
{ PDM_V2_CTRL, 0x001C8797 },
{ PDM_V2_FIFO_CTRL, 0x0003E000 },
};
static const struct regmap_config rockchip_pdm_v2_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = PDM_V2_GAIN_CTRL,
.reg_defaults = rockchip_pdm_v2_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(rockchip_pdm_v2_reg_defaults),
.writeable_reg = rockchip_pdm_v2_wr_reg,
.readable_reg = rockchip_pdm_v2_rd_reg,
.volatile_reg = rockchip_pdm_v2_volatile_reg,
.precious_reg = rockchip_pdm_v2_precious_reg,
.cache_type = REGCACHE_FLAT,
};
static const struct of_device_id rockchip_pdm_v2_match[] __maybe_unused = {
{ .compatible = "rockchip,rk3506-pdm", },
{ .compatible = "rockchip,rk3576-pdm", },
{},
};
MODULE_DEVICE_TABLE(of, rockchip_pdm_v2_match);
static int rockchip_pdm_v2_path_parse(struct rk_pdm_v2_dev *pdm, struct device_node *node)
{
unsigned int path[PDM_V2_PATH_MAX];
int cnt = 0, ret = 0, i = 0, val = 0, msk = 0;
cnt = of_count_phandle_with_args(node, "rockchip,path-map",
NULL);
if (cnt != PDM_V2_PATH_MAX)
return cnt;
ret = of_property_read_u32_array(node, "rockchip,path-map",
path, cnt);
if (ret)
return ret;
for (i = 0; i < cnt; i++) {
if (path[i] >= PDM_V2_PATH_MAX)
return -EINVAL;
msk |= PDM_V2_RX_PATH_SEL_MASK(i);
val |= PDM_V2_RX_PATH_SEL(i, path[i]);
}
regmap_update_bits(pdm->regmap, PDM_V2_CTRL, msk, val);
return 0;
}
static int rockchip_pdm_v2_keep_clk_always_on(struct rk_pdm_v2_dev *pdm)
{
unsigned int upsamplerate, mclk;
int index, ret = 0;
index = get_pdm_v2_clkref(pdm, PDM_V2_DEFAULT_RATE);
if (index < 0)
return -EINVAL;
mclk = clkref[index].clk;
upsamplerate = clkref[index].clk_out;
ret = clk_prepare_enable(pdm->clk_out);
if (ret)
goto err_prepare_clk_out;
ret = clk_prepare_enable(pdm->clk);
if (ret)
goto err_clk_out;
pm_runtime_forbid(pdm->dev);
dev_info(pdm->dev, "CLK-ALWAYS-ON: mclk: %d, upsamplerate: %d, samplerate: %d\n",
mclk, upsamplerate, PDM_V2_DEFAULT_RATE);
return 0;
err_clk_out:
clk_disable_unprepare(pdm->clk_out);
err_prepare_clk_out:
return ret;
}
static int rockchip_pdm_v2_parse_quirks(struct rk_pdm_v2_dev *pdm)
{
int ret = 0, i = 0;
for (i = 0; i < ARRAY_SIZE(of_quirks); i++)
if (device_property_read_bool(pdm->dev, of_quirks[i].quirk))
pdm->quirks |= of_quirks[i].id;
if (pdm->quirks & QUIRK_ALWAYS_ON)
ret = rockchip_pdm_v2_keep_clk_always_on(pdm);
return ret;
}
static void rockchip_pdm_v2_quirks_close_clk(struct rk_pdm_v2_dev *pdm)
{
if (pdm->quirks & QUIRK_ALWAYS_ON) {
clk_disable_unprepare(pdm->clk_out);
clk_disable_unprepare(pdm->clk);
}
}
static int rockchip_pdm_v2_register_platform(struct device *dev)
{
int ret = 0;
if (device_property_read_bool(dev, "rockchip,no-dmaengine")) {
dev_info(dev, "Used for Multi-DAI\n");
return 0;
}
ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0);
if (ret)
dev_err(dev, "Could not register PCM\n");
return ret;
}
static int rockchip_pdm_v2_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct rk_pdm_v2_dev *pdm;
struct resource *res;
void __iomem *regs;
int ret;
pdm = devm_kzalloc(&pdev->dev, sizeof(*pdm), GFP_KERNEL);
if (!pdm)
return -ENOMEM;
regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(regs))
return PTR_ERR(regs);
pdm->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&rockchip_pdm_v2_regmap_config);
if (IS_ERR(pdm->regmap))
return PTR_ERR(pdm->regmap);
pdm->capture_dma_data.addr = res->start + PDM_V2_RXFIFO_DATA;
pdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
pdm->capture_dma_data.maxburst = PDM_V2_DMA_BURST_SIZE;
pdm->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, pdm);
pdm->pinctrl = devm_pinctrl_get(&pdev->dev);
if (!IS_ERR_OR_NULL(pdm->pinctrl)) {
pdm->clk_state = pinctrl_lookup_state(pdm->pinctrl, "clk");
if (IS_ERR(pdm->clk_state)) {
pdm->clk_state = NULL;
dev_warn(pdm->dev, "Have no clk pinctrl state\n");
}
}
pdm->start_delay_ms = PDM_V2_START_DELAY_MS_DEFAULT;
pdm->clk = devm_clk_get(&pdev->dev, "pdm_clk");
if (IS_ERR(pdm->clk))
return PTR_ERR(pdm->clk);
pdm->hclk = devm_clk_get(&pdev->dev, "pdm_hclk");
if (IS_ERR(pdm->hclk))
return PTR_ERR(pdm->hclk);
pdm->clk_out = devm_clk_get(&pdev->dev, "pdm_clk_out");
if (IS_ERR(pdm->clk_out))
return PTR_ERR(pdm->clk_out);
ret = clk_prepare_enable(pdm->hclk);
if (ret)
return ret;
rockchip_pdm_v2_set_samplerate(pdm, PDM_V2_DEFAULT_RATE);
rockchip_pdm_v2_rxctrl(pdm, 0);
regmap_read(pdm->regmap, PDM_V2_VERSION, &pdm->version);
/*
* The pdm version rule:
* Low 16bit is soc number.
* High 16bit is PDM release time.
* The Only soc number is changed with every chips. So use the
* release time here.
*/
pdm->version = (pdm->version >> 16) & 0xffff;
ret = rockchip_pdm_v2_path_parse(pdm, node);
if (ret != 0 && ret != -ENOENT)
goto err_hclk;
ret = rockchip_pdm_v2_parse_quirks(pdm);
if (ret)
goto err_hclk;
/*
* MUST: after pm_runtime_enable step, any register R/W
* should be wrapped with pm_runtime_get_sync/put.
*
* Another approach is to enable the regcache true to
* avoid access HW registers.
*
* Alternatively, performing the registers R/W before
* pm_runtime_enable is also a good option.
*/
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = rockchip_pdm_v2_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
/* API snd_soc_register_component will try to rebind card per
* each component register. And the ASoC allow no-pcm card instance.
* devm_snd_soc_register_component
* snd_soc_try_rebind_card
* snd_soc_bind_card
* snd_soc_add_pcm_runtime
* devm_snd_dmaengine_pcm_register
* So, we should register PCM before DAI component.
*/
ret = rockchip_pdm_v2_register_platform(&pdev->dev);
if (ret)
goto err_suspend;
ret = devm_snd_soc_register_component(&pdev->dev,
&rockchip_pdm_v2_component,
&rockchip_pdm_v2_dai, 1);
if (ret) {
dev_err(&pdev->dev, "could not register dai: %d\n", ret);
goto err_suspend;
}
clk_disable_unprepare(pdm->hclk);
return 0;
err_suspend:
if (!pm_runtime_status_suspended(&pdev->dev))
rockchip_pdm_v2_runtime_suspend(&pdev->dev);
err_pm_disable:
rockchip_pdm_v2_quirks_close_clk(pdm);
pm_runtime_disable(&pdev->dev);
err_hclk:
clk_disable_unprepare(pdm->hclk);
return ret;
}
static int rockchip_pdm_v2_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
rockchip_pdm_v2_runtime_suspend(&pdev->dev);
return 0;
}
static const struct dev_pm_ops rockchip_pdm_v2_pm_ops = {
SET_RUNTIME_PM_OPS(rockchip_pdm_v2_runtime_suspend,
rockchip_pdm_v2_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
};
static struct platform_driver rockchip_pdm_v2_driver = {
.probe = rockchip_pdm_v2_probe,
.remove = rockchip_pdm_v2_remove,
.driver = {
.name = "rockchip-pdm-v2",
.of_match_table = of_match_ptr(rockchip_pdm_v2_match),
.pm = &rockchip_pdm_v2_pm_ops,
},
};
module_platform_driver(rockchip_pdm_v2_driver);
MODULE_AUTHOR("Jason Zhu<jason.zhu@rock-chips.com>");
MODULE_DESCRIPTION("Rockchip PDM V2 Controller Driver");
MODULE_LICENSE("GPL");
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